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2019 GMC Sierra 1500 Denali 5.3L Cylinder 3
Posted to GM Engine on 12/22/2025 11 Replies

Vehicle came in with a p0300, and a feeling of misfire. With scanner, could see that #3 is a constant miss. Whenever I restart the vehicle, there is a good amount of white smoke coming out of the tailpipe. Pulled the #3 plug and it was black and wet. Used ...

11 Replies Received (View Replies)

  Related Documents & Media  2019 GMC Sierra 1500 Denali

 
Message Closed w/FIX

car Vehicle Data

2019 GMC Sierra 1500 Denali

VIN 1GTU9FED2K
Engine5.3 L / 8 cyl / GAS
Trans8-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedCylinder 3
ConditionsOil Intrusion
Message Closed w/FIX

car Vehicle Data

2019 GMC Sierra 1500 Denali

VIN 1GTU9FED2K
Engine5.3 L / 8 cyl / GAS
Trans8-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedCylinder 3
ConditionsOil Intrusion